Pump valve mounting



Sept. 26, 1939. HE. BRANDT PUMP VALVE MOUNTING Filed June 7, 1937 T T 1 P H r 3 f m F U i I z r a 1 1| .1 z 4 4. P. F E- a M W F 2 H 67.? 95 q 5 [IL 1- r w a 5 III! II .4 W0 \I m0 8 6 a M f 1 WM. 1 z g 321 j v .:I. IQ-1 Q a 2 M a Z Z W Mm w a 7 my aw K iii 4 4 I l I I ll Patented Sept. 26, 1939 UNITED STATES PATENT OFFICE PUMP VALVE MOUNTING Application June 7, 1937, Serial No. 146,764

2 Claims.

This invention relates to the construction of a valve mounting for a pump cylinder and while the invention is capable of many uses and applications, it has been developed particularly for an air pump used in connection with Sprayers.

It is an object of this invention to provide a simple assembly of closure member and valve which can be inexpensively produced and secured in the pump cylinder.

It is another object of the invention to provide a simple assembly of diaphragm and valve for the pump cylinder, which parts can be placed in the cylinder without the walls of the cylinder being cut or perforated.

It is a further object of the invention to provide a simple valve construction, one which will operate properly and which comprises a spring, said spring acting to hold the valve to its seat and also acting to hold the valve-carrying means in position.

It is still another object of the invention to provide in combination with a diaphragm extending across the cylinder and secured therein, said diaphragm having an opening therethrough with a valve seat around said opening, a valve-carrying member supported by said diaphragm and easily and quickly removable therefrom with said valve. These and other objects and advantages of the invention will be fully set forth in the following description made in connection with the accompanying drawing in which like reference characters refer to similar parts'throughout the several views and in which:-

Fig. 1 is for the most part a central vertical section through the pump cylinder and parts therein, a portion of the cylinder being shown in side elevation;

Fig. 2 is a view in side elevation of the cylinder,

a portion being broken away to show some of the parts therein;

Fig. 3 is a bottom plan view of Fig. 1; and Fig. 4 is a vertical section taken on line 44 of Fig. l as indicated by the arrows.

5 Referring to the drawing, a pump cylinder ID is shown in which is reciprocable a plunger I I. This plunger is shown as having a flange I la extending around and fitting in cylinder lll so that the plunger is cup-shaped. A plate I2 overlies the 50 top of said plunger and there is a plate I3 engaging the underside of said plunger. Plates I2 and I3 are apertured to have plunger rod I4 extend therethrough, said rod being threaded to receive nuts I5 and I6 respectively engaging plates l2 5;. and I3 to hold the same against plunger II secure the same in place. The structure so far described is old and in common use.

In accordance with the present invention, a diaphragm I I is provided of substantially circular form extending across the entire area of cylinder 5 V is formed on the underside of said diaphragm,

said seat surrounding said aperture. In the embodiment of the invention illustrated, seat Ilc is formed by bending downwardly the metal of the diaphragm which surrounds said aperture, thus forming a short cylinder, the lower edge of which 20 forms thevalve'seat. Flange IIa has a pair of lugs I'M formed thereon at opposite sides thereof and extending inwardly toward the axis of the cylinder and substantially perpendicular thereto. A bar I8 is provided, the opposite ends of which 25 rest upon lugs I'Id respectively. Said ends of bar I8 have pressed therein a groove IBa, the sides of which extend along the sides of the lugs I'ld so that said lugs are disposed in said grooves and lateral movement of said bar is prevented. Bar 30 I8 has formed at the central portion thereof a cup I8b having a chamber or depression I8c therein. A compression coil spring I9 is seated in cup l8b having one end engaging the bottom of said cup and the upper end of said spring carries a cuplike plate 20. Plate 26 has a central depressed portion 26a; in the bottom thereof which extends into the top of spring I9 so that the upper portion of said spring extends about said depression and holds member 20 in position centrally of said 40 spring. A disk 2I of yielding material, preferably resilient, is carried in member 20. Disk 2I is preferably made of rubber or similar material and forms a valve adapted to engage the valve seat lie to close aperture Ilb'. A pin 22 extends centrally through plate 28, through the bottom of cup l8b centrally thereof and passes centrally through spring I9. Pin 22 has an enlarged portion 22a. disposed in the depressed portion 20a of plate 20, the upper surface of said portion engaging the bottom of disk 2I. Pin 22 also has an enlarged portion or head 22h below cup I81) and engaging the bottom of the latter.

In operation, it will be seen that spring i9 will press valve disk 2I against the valve seat I'Ic so that aperture H1) is normally closed. Upward movement of plunger II can take place without any air being drawn into the cylinder and said movement will cause the outside air to press disk 2| more firmly against its seat. Downward movement of plunger II will force air through aperture l'lb, compressing spring l9 so that said air may be discharged from the cylinder. It will be noted that when spring E9 is compressed pin 22 will move through the bottom of cup [81). It will also be noted that spring 19 not only urges disk 2| against its seat but also acts to press bar I 8 against the lugs l'ld. This actionis causedby the fact that lugs [1d are rigid with the diaphragm l7 against which valve disk 2| reacts. At the same time bar Hi can be readily removed by pressing the same upwardly so that the bar can be rotated to bring the ends thereof and grooves |8a out of alinement with the lugs Md. The bar is then readily removable with the valve diskZl and the other parts. Pin 22 and specifically its enlarged end 2217 acts to limit the movement of plate 20 and valve disk 2! away from bar [8 so that the same constitute one unitary assembly when removed from diaphragm l l. Enlargement 22b thus forms a stop to limit the movement of member 29 away from bar [8. The valve 2| is thus very readily removable for replacement, cleaning or other purpose.

From the above description it is seen that applicant has provided a very simple and yet very eflicient valve structure. All of the parts canbe made by punching operations and needonly to be assembled. All parts are carried by the diaphragm I! and it is unnecessary to cut or deform the cylinder wall. The valve as stated can be very easily and quickly removed and replaced in position. The action of the valve isvery eflicient as the spring l9 holds the disk 2| in position axially of the cylinder. The parts of the. device are quite few, easily producedand the structure is quite inexpensive, The device has been amply demonstrated in actual practice, found to be very successful and efiicient and is being commercially made.

It will, of course, be understood that various changes may be made in the form, details, arrangement and proportions of the parts, without departing from the scope of applicants invention, which generally stated, consists in a device capable of carrying out the objects above set forth in the parts and combinations of parts disclosed and defined in the appended claims.

" What is claimed is:

1. A valve structure assembly comprising a diaphragm of circular outline formed of sheet metal and havinga cylindrical rim thereabout adapted to fit and be secured in a cylindrical member such as a sprayer pump cylinder, said diaphragm having a'central-aperture therethrough with a projecting cylindrical flange thereabout forming a valve seat, said rim having diametrically opposite lugs extending toward each other and spaced below said. diaphragm and flange, a bar extending between and supported upon said lugs having a length less than the inner diameter of said rim, said bar having a central spring-receiving recess, a yielding valve member positioned to engage said flange, a valve carrier for said valve having a stem projecting therefrom and through said bar in'said recess, a compression coiled spring seated, in said recess engaging said bar at one end and said carrier at its other end and acting to hold said valve against said valve seat and to hold said bar against said lugs, said stem having a stop means thereon below said bar to retain said stem and valve carrier when said bar is removed from said lugs.

2. The structure set forth in claim 1, said bar having recesses on its underside in which said lugs are disposed whereby circumferential movement of said bar about said stem is prevented.

HENRY E. BRANDT. 

